Featured questions for electronic companies

I. Analog Circuit
 

1. What is the content of kilhov's theorem? (Shi LAN Microelectronics)

Kilhov's current law is a law of Charge Conservation, that is, the charge flowing into a node in a circuit is equal to the charge flowing out of the same node.

Kilhov's law of voltage is a law of conservation of energy, that is, the sum of the circuit voltage in a loop is zero.

2. Flat capacitor formula (C = ε s/4 π kD ). (Unknown)

3. The most basic characteristics, such as the transistor curve. (Unknown)

4. Describe the concept of feedback circuit and list their applications. (Shi LAN Microelectronics)

5. Negative Feedback types (voltage feedback, current feedback, voltage feedback and current feedback); negative feedback advantages (reducing the gain sensitivity of the amplifier, changes the input and output resistors, improves the linearity and non-linear distortion of the amplifier, and effectively extends the passband of the amplifier for automatic adjustment) (unknown)

6. What is the purpose of frequency compensation for a amplifying circuit? (Shi LAN Microelectronics)

7. Frequency response, for example, several methods to change the frequency response curve. (Unknown)

8. Provide a checkpoint Op Amplifier, how to compensate the phase, and draw the Potter diagram after compensation. (Concave and convex)

9. The advantages and disadvantages of the basic amplifier circuit (voltage amplifier, current amplifier, reciprocal amplifier and mutual resistance amplifier), especially the wide use of differential structure. (Unknown)

10. A differential circuit is provided to tell the output voltage y and Y-to calculate the common mode component and differential mode component. (Unknown)

11. Two input tubes for poor picture placement. (Concave and convex)

12. Draw the circuit schematic diagram of addition, subtraction, differentiation, and integral operation composed of Op-ops. And draw a transistor-level Op Amplifier Circuit. (Shi LAN Microelectronics)

13. Use an operational amplifier to form a 10-fold amplifier. (Unknown)

14. A simple circuit is provided, which allows you to analyze the output voltage characteristics (that is, an integrated circuit) and obtain the rise/fall time at a certain point on the output end. (Infineon test questions)

15. resistor R and capacitor C are connected in series. The input voltage is the voltage between R and C, and the output voltage is the voltage on C and the voltage on R, respectively, the frequency spectrum of the input voltage of these two circuits is required to determine what the two circuits are for high-pass filters and for low-pass filters. When RC <q, There is a clock delay, write the factors that determine the maximum clock, and give an expression. (Weisheng via 2003.11.06 Shanghai Written Examination)

18. Advantages and Disadvantages of static and dynamic time series simulation. (Weisheng via 2003.11.06 Shanghai Written Examination)

19. A level-4 MUX, where the second-level signal is the key signal to improve timing. (Via2003.11.06 Shanghai test questions)

20. A door-level diagram is provided, and the transmission latency of each door is also given. The Key Path is also asked, so that the output depends on the Key Path. (Unknown)

21. In terms of logic, the Kano diagram of digital circuits is simplified, the timing sequence (synchronous asynchronous difference), the trigger has several types (differences and advantages), and the full processors. (Unknown)

22. Kano diagram is written into a logical expression. (Weisheng via 2003.11.06 Shanghai Written Examination)

23. Simplify the sum of f (a, B, c, d) = M. (Wei Sheng)

24. Please show the CMOS inverter schmatic, layout and Its cross sectionwith p-Well process. plot its transfer curve (Vout-Vin) and also explain the operation region of PMOS and NMOS for each segment of the Transfer Curve? (Weisheng pen questions circuit design-beijing-03.11.09)

25. To design a CMOS invertor with balance rise and fall time, Please define the ration of channel width of PMOS and NMOS and explain?

26. Why is the width-to-length ratio of the P-tube larger than that of the N-tube in a standard inverted phase device? (Shi LAN Microelectronics)

27. Build a two-input and non-gate with MOS. (Yangzhi electronic test)

28. Please draw the transistor level schematic of a CMOS 2 input and gate and explain which input has faster response for output rising edge. (less delay time ). (Weisheng pen questions circuit design-beijing-03.11.09)

29. Draw the not, Nand, nor symbols, truth tables, and transistor level circuits. (Infineon test)

30. Draw a CMOS diagram and draw a tow-to-one MUX gate. (Weisheng via 2003.11.06 Shanghai Written Examination)

31. Use one MUX and one inv to realize the same or different. (Philips-Datang Written Examination)

32. Draw the CMOS circuit diagram of Y = a * B c. (Subject-wide questions)

33. Use logic and CMOS circuits to implement AB CD. (Philips-Datang Written Examination)

34. The transistor-level circuit diagram of the CMOS circuit is drawn to realize y = a * B c (D E ). (Shi LAN Microelectronics)

35. Use 4 to select 1 to implement f (x, y, z) = xz yz '. (Unknown)

36. Give an expression F = xxxx xxxxx xxxx with a minimum number of non-gate and non-gate implementations (in fact, simplification ).

37. A simple schematic consisting of multiple not, Nand, or nor elements is provided. The waveforms of each point are drawn based on the input waveform. (Infineon test)

38. To implement logic (a xor B) or (C and D), select one of the following logic and explain why? 1) inv 2) and 3) or 4) nand 5) nor 6) XOR answer: NAND (unknown)

39. Use and non-gate to design the full multiplier. (Huawei)

40. Two door circuits are provided for you to analyze the similarities and differences. (Huawei)

41. Implemented with a simple circuit. When a is input, the output B waveform is... (Shi LAN Microelectronics)

42. A, B, C, D, and E are voting. Most of them follow a minority. The output is F (that is, if a, B, c, d, if the number of 1 in E is greater than 0, F output is 1; otherwise, F is 0). It is implemented with a non-gate. There is no limit on the number of inputs. (Unknown)

43. Use a waveform to represent the function of the D Trigger. (Yangzhi electronic test)

44. Create an edge trigger with the transport door and backward device. (Yangzhi electronic test)

45. Draw the D trigger with logic. (Weisheng via 2003.11.06 Shanghai Written Examination)

46. Draw the DFF structure diagram and implement it using OpenGL. (Wei Sheng)

47. Draw the circuit diagram and layout of a cmos d-lock. (Unknown)

48. Differences between D triggers and D latches. (Xintai hardware interview)

49. Briefly describe the similarities and differences between latch and filp-flop. (Unknown)

50. Concepts and differences between latch and DFF. (Unknown)

51. What is the difference between latch and register? Why do we use register now to describe how latch is generated at the behavior level. (Nanshan zhiqiao)

52. Use the D trigger to create a binary circuit and ask what is the status chart. (Huawei)

53. How can I draw a logic circuit that uses the D trigger to achieve 2x division of data? (Hand Wang Written Examination)

54. How to use a D trigger to form a two-frequency circuit with or without a gate? (Dongxin test)

55. How many flip-flop circuits are needed to divide by 16? (Intel) 16?

56. Use filp-flop and logic-gate to design a one-bit calculator, input carryin and current-stage, and output carryout and next-stage. (unknown)

57. Use the D trigger to make a 4-digit count. (Huawei)

58. Implement N-Bit Johnson Counter, n = 5. (Nanshan zhiqiao)

59. Use a familiar design method to design a 7-hexadecimal cyclic counter with preset initial values. What about a 15-digit counter? (Shi LAN Microelectronics)

60. Of course, the design of digital circuits is required to be called by Using OpenGL/VHDL, for example, the design of counters. (Unknown)

61. Differences between blocking and nonblocking assignment. (Nanshan zhiqiao)

62. Write an asynchronous D-Trigger's OpenGL module. (Yangzhi electronic test)

Module dff8 (CLK, reset, D, q );

Input CLK;

Input reset;

Input [7:0] D;

Output [7:0] q;

Reg [7:0] q;

Always @ (posedge CLK or posedge reset)

If (reset)

Q <= 0;

Else

Q <= D;

Endmodule

63. Do I use the D trigger to implement a dual-division-by-Dual-division using the Tilde description in the Tilde format? (Hand Wang Written Examination)

Module divide2 (CLK, clk_o, reset );

Input CLK, reset;

Output clk_o;

Wire in;

Reg out;

Always @ (posedge CLK or posedge reset)

If (reset)

Out <= 0;

Else

Out <= in;

Assign in = ~ Out;

Assign clk_o = out;

Endmodule

64. programmable logic devices are becoming more and more important in modern electronic design. a) What programmable logic devices do you know? B) describe the logic of an 8-bit D trigger by using VHDL or by using the language-specific language (VHDL. (Hand Wang Written Examination)

Pal, PLD, CPLD, and FPGA.

Module dff8 (CLK, reset, D, q );

Input CLK;

Input reset;

Input D;

Output Q;

Reg Q;

Always @ (posedge CLK or posedge reset)

If (reset)

Q <= 0;

Else

Q <= D;

Endmodule

65. Use HDL to describe the four-digit full divider and a 5-digit crossover circuit. (Shi LAN Microelectronics)

66. Write a piece of code by Using OpenGL or VHDL to implement a 10-digit counter. (Unknown)

67. Write a piece of code by Using OpenGL or VHDL to eliminate a glitch. (Unknown)

68. The question of a state machine is implemented by using OpenGL (however, this state machine is actually poorly drawn and can be easily misunderstood ). (Weisheng via 2003.11.06 Shanghai Written Examination)

69. Describe the design of a traffic signal. (Shi LAN Microelectronics)

70. Draw a state machine and accept a vending machine with 1, 2, and 5 cents. Each newspaper has 5 cents. (Yangzhi electronic test)

71. Design a vending machine system. If soda water is sold, only three coins can be invested. You must retrieve the money correctly. (1) Draw the FSM (Finite State Machine); (2) use the FPGA programming syntax to meet the requirements of FPGA design. (Unknown)

72. design an automatic beverage vending machine with 10 cents for drinks and five or ten cents for coins. Consider the following: (1) Draw a FSM (Finite State Machine); (2) the syntax must comply with the requirements of FPGA design. (3) tools available in the design project and the general design process. (Unknown)

73. Draw a state chart that can detect 10010 strings, and implement it in OpenGL. (Wei Sheng)

74. Use FSM to implement sequence Detection Module of 101101. (Nanshan zhiqiao)

A is the input end and B is the output end. If a is a continuous input of 1101, B is 1. Otherwise, it is 0. Example A: 0001100110110100100110

B: 0000000000100100000000

Draw the state machine; Use RTL to describe its state machine. (Unknown)

75. Check the specific strings in Stream Using the Tilde/vddl (written in the state machine ). (Philips-Datang Written Examination)

76. Write a FIFO controller (including an empty, full, and half-full signal) by using VHDL/VHDL ). (Philips-Datang Written Examination)

77. An existing user needs an integrated circuit product that can implement the following functions: Y = lnx, where X is a 4-bit binary integer input signal. Y is a binary decimal output and requires two decimal places to be retained. The power supply voltage is 3 ~ 5 V suppose that after receiving the project, the company will submit you to take charge of the design of the product and discuss the entire design process of the product. (Shi LAN Microelectronics)

78. What is the difference between SRAM, falsh memory, and dram? (Xintai hardware interview)

79. The schematic diagram of single-tube DRAM is provided. (the authors of the "digital electronic technology basics" of the West electric edition, Yang Shaohua and Feng maoguan, see Figure 9-14B on page 205.) I would like to ask you how to improve the refresh time, there are a total of five problems, which cannot be remembered. (Reduce temperature and increase capacitor storage capacity) (infineon test)

80. Please draw schematic of a common SRAM cell with 6 transistors, point out which nodes can store data and which node is word line control? (Weisheng pen questions circuit design-beijing-03.11.09)

81. Terms: SRAM, ssram, SDRAM terms: IRQ, bios, USB, VHDL, and SDR

IRQ: interrupt request BIOS: Basic Input Output System USB: Universal Serial Bus

VHDL: vhic Hardware Description Language SDR: Single Data Rate

The abbreviation of a voltage controlled oscillator (VCO ). Dynamic random memory (Dram ).

This term is just an alias for a boring foreign language, such as PCI, ECC, DDR, interrupt, pipeline IRQ, bios, USB, VHDL, and RAM (dynamic random memory) for a large-scale VCO (voltage controlled oscillator ), fir iir dft (Discrete Fourier transformation) or Chinese, for example:. quantization Error B. histogram C. white Balance

 

Ii. IC design basics (process, process, layout, and device)

1. Our company's products are integrated circuits. Please describe your understanding of integrated circuits, list some information related to integrated circuits (for example, the concepts of analog, digital, bipolar, CMOS, MCU, Proteus, CISC, DSP, ASIC, FPGA, etc ). (Shi LAN micro interview questions)

2. What are the differences between FPGA and ASIC. (Unknown)

Answer: FPGA is a programmable ASIC.

ASIC: a dedicated integrated circuit designed and manufactured for a user. According to the specific requirements of a user, it can be customized with low development cost, short delivery cycle supply, and semi-customized IC. Compared with other ASIC (Application Specific ic) such as the gate array, they have the advantages of short design and development cycles, low design and manufacturing costs, advanced development tools, no testing for standard products, stable quality, and real-time online inspection.

3. What are the differences between OTP film and mask film? (Shi LAN micro interview questions)

4. What expressions do you know about integrated circuit design? (Shi LAN micro interview questions)

5. Describe your understanding of the integrated circuit design process. (Shi LAN micro interview questions)

6. Briefly describe the design process of FPGA and other programmable logic devices. (Shi LAN micro interview questions)

7. ICPs design the frontend-to-backend processes and EDA tools. (Unknown)

8. design flow from RTL synthesis to tape out, and list the tools used in each step. (unknown)

9. design flow of ASIC. (Weisheng via 2003.11.06 Shanghai Written Examination)

10. Write down the ASIC preliminary design process and corresponding tools. (Wei Sheng)

11. design the process of the integrated circuit and write related tools. (Yangzhi electronic test)

First, we will introduce the IC Development Process:

1) design input)

The function description of the device is completed by using the language of VHDL or OpenGL to generate the HDL code.

Language Input Tool: Summit visualhdl

Mentor renior

Graphics Input: composer (cadence );

Viewlogic (viewdraw)

2. Circuit Simulation)

Perform the previous Logical simulation of the vhd code to verify whether the function description is correct.

Digital Circuit simulation tools:

Verolog: Cadence verolig-XL

Synopsys VCs

Mentor modle-sim

VHDL: Cadence nc-VHDL

Synopsys VSS

Mentor modle-sim

Analog Circuit simulation tool:

* ** Anti hspice pspice, Spectre micro microwave: eesoft: HP

3.) logical synthesis (Synthesis tools)

Logic integrated tools can convert the design idea vhd code into a gate-Level Circuit corresponding to a certain technical means; Gates Delay) the interface is reversed to the generated door-level network table, and the system returns to the circuit simulation stage for re-simulation. The net table generated by the final simulation result is called the Physical Net table.

12. Could you briefly describe the whole process of designing the backend? (Shi LAN micro interview questions)

13. Have you ever touched on Automatic Layout and wiring? Please state one or two tools and software. What are the basic elements required for Automatic Layout and wiring? (Shi LAN micro interview questions)

14. Describe your understanding of the integrated circuit process. (Shi LAN micro interview questions)

15. list several typical integrated circuit processes. In technology, 0.25 is often mentioned. What does 0.18 mean? (Shi LAN micro interview questions)

16. Describe the current process in China. (Shi LAN micro interview questions)

17. What are the doping methods in the semiconductor process? (Shi LAN micro interview questions)

18. describes the process and final result of the latch effect in the CMOS circuit? (Shi LAN micro interview questions)

19. Explain latch-up and antenna effect and their preventive measures. (unknown)

20. What is latchup? (Subject-wide questions)

21. What is the narrow interval effect? (Subject-wide questions)

22. What are NMOS, PMOS, and CMOS? What is enhanced and depletion type? What are PNP and PNP? What are their differences? (Shi LAN micro interview questions)

23. In the Silicon Gate coms process, what are the requirements for the connection of the P or n tubes in the N trap, and the potential of the N trap? (Shi LAN micro interview questions)

24. Draw a cross-over diagram of the CMOS Transistor (which should be a longitudinal profile) to show all possible transmission and transfer characteristics. (Infineon test questions)

25. Take Interver as an example to write the n-well CMOS process and draw a profile. (Subject-wide questions)

26. Please explain how we describe the resistance in semiconductor. Compare the resistance of a metal, poly and diffusion in tranditional CMOS process. (w Sheng pen questions circuit design-beijing-03.11.09)

27. Describe the zone in which half of MOS work. (Bumpy questions and interviews)

28. Draw the NMOS cross-section diagram of p-bulk. (Bumpy questions and interviews)

29. Write schematic note (?), The more, the better. (Bumpy questions and interviews)

30. How to overcome and use Parasitic effects in icdesign. (Unknown)

31. The physical characteristics of MOS are generally not considered as a written examination, because they are all micro-electronics physics. The formula is derived too well, unless the interview is an old study. Familiar software is required for icdesign: cadence, Synopsys, avant, and UNIX.

32. The Unix Command CP-R, RM, and uname. (Yangzhi electronic test)

____________________________________________________________

Iii. MCU, MCU, and computer principles

1. describes the main modules of a single-chip microcomputer system, and describes the flow of data streams and control flow between modules. Briefly describe the design principles of the Single Chip Microcomputer Application System. (Shi LAN micro interview questions)

2. Draw a line chart between 8031 and 2716 (2 k * 8 ROM). The three-eight decoder, 8031 p2.5, p2.4, and p2.3 must be used for decoding. The basic address range is 3000h-3fffh. Does this 2716 overlap? Based on what? If yes, a 2716 overlapping address range is written. (Shi LAN micro interview questions)

3. Use 8051 to design a schematic diagram with an 8*16 keyboard and eight digital tubes (gongyang. (Shi LAN micro interview questions)

4. What is the meaning of the PCI bus? What are the main features of the PCI bus? (Shi LAN micro interview questions)

5. What is the concept of interruption? Briefly describe the process of interruption. (Shi LAN micro interview questions)

6. For example, the single-chip microcomputer is interrupted for several types, and the programming interrupt program should pay attention to the issues. (unknown)

7. Use an open-loop pulse speed control system to control the speed of the DC motor. The procedure starts from 8051. The principle is as follows: by p3.4 output pulse duty cycle to control the speed, the greater the duty cycle, the faster the speed; and the duty cycle by the K7-K0 eight switches to set, directly connect to the P1 port ("0" when the switch is switched to the bottom, "1" when switched to the top, to form an eight-bit binary number N), the duty cycle is required to N/256. (Shi LAN micro interview questions)

The following program uses the notation to implement this function. Please complete the remaining parts.

MoV P1, # 0ffh

Loop1: mov R4, # 0ffh

--------

MoV R3, #00 h

Loop2: mov A, p1

--------

Subb A, r3

Jnz skp1

--------

Skp1: mov C, 70 h

MoV p3.4, c

Acall delay: the delay subroutine is omitted

--------

--------

Ajmp loop1

8. What should I first check if the single-chip microcomputer is not running after power-on? (Dongxin pen exam)

9. What is PC chipset? (Yangzhi electronic test)

The chipset (chipset) is the core component of the main board. It is usually divided into the north bridge chip and the south bridge chip according to the different positions on the main board. Beiqiao chip provides support for CPU type and clock speed, memory type and maximum capacity ISA/PCI/AGP slot, and ECC error correction. The nanqiao chip provides KBC (keyboard controller), RTC (Real-time clock Controller), USB (Universal Serial Bus), ultra DMA/33 (66) eide data transmission mode and ACPI (Advanced Energy Management) support. Among them, beiqiao chip plays a dominant role, also known as host bridge ).

In addition to the most common North-South Bridge architecture, the current chipset is developing towards a more advanced accelerated assembly line architecture. Intel's 8xx series chipset represents this type of chipset, it directly connects subsystems such as IDE interfaces, sound effects, modem and USB to the master chip and provides a bandwidth of 266 Mb/s, which is twice the width of the PCI bus.

10. If my resume says I have used CPU, I will ask questions such as how the CPU works and how the pipeline works. (Unknown)

11. Basic Components of computers and their respective functions. (Dongxin pen exam)

12. Draw out the typical input device and microcomputer interface logic (data interface, control interface, recorder/buffer) in the microcomputer interface circuit ). (Hand Wang Written Examination)

13. What is the main part of the cache. (Weisheng via 2003.11.06 Shanghai Written Examination)

14. Differences in synchronous asynchronous transmission (unknown)

15. similarities, differences, characteristics, and comparison between serial communication and synchronous communication. (Huawei interview questions)

16. What is the TTL logic of rs232c High-Level Pulse? (Negative logic ?) (Huawei interview questions)

 

Iv. signal and system

1. The audio rate is generally 300 ~ 3400Hz. If sampling is performed without distortion, what is the minimum sampling frequency? If 8 KHz sampling frequency is adopted and 8 bit PCM encoding is used, what is the amount of signal data stored in one second? (Shi LAN micro interview questions)

2. What is the anti-quest law and how to convert analog signals to digital signals. (Huawei interview questions)

3. What should I do if the bandwidth of the analog signal is 5 kHz and the 8 K sampling rate is used? Lucent) two ways?

4. signal and system: Relationship between time domain and frequency domain. (Huawei interview questions)

5. Provide the time-domain signal and calculate its DC component. (Unknown)

6. A time-domain signal is provided. (1) write the frequency component and (2) write the Fourier transformation series. (3) when the waveform is filtered out by the low-pass filter and only one harmonic is retained, the output waveform after filtering is drawn. (Unknown)

7. Fourier transformation of Sketch continuous sine signal and Continuous Rectangular Wave (both with graphs. (Infineon test questions)

8. The expressions and connections of Laplace transformation and Fourier transformation. (Xintai hardware questions)

____________________________________________________________

V. DSP, embedded, software, etc.

1. Use a block diagram to describe a practical digital signal processing system that you are familiar with and make a brief analysis. If not, you can design a simple digital signal processing system by yourself, and describe its functions and usage. (Shi LAN micro interview questions)

2. Classification and structure features of digital filters. (Shi LAN micro interview questions)

3. Similarities and Differences between fir and IIR filters. (Xintai hardware questions)

4. LA's transformation is similar to the ztransformation formula. H (n) =-A * H (n-1) B * delta (n). evaluate the ztransformation of H (n); B. ask if the system is stable. C. write the difference equation of the FIR digital filter; (unknown)

5. What are the differences between DSP and general-purpose processor in terms of structure? Please briefly draw a DSPs structure you are familiar. (Xin Wei DSP software interview questions)

6. Definitions of fixed-point DSPs and floating-point DSPs (or differences between them)

7. Talk about your understanding of circular addressing and reverse addressing (Xin Wei DSP software interview questions)

8. Write the binary complement code [-] and Binary Offset code. Expressed by q15 as 0.5 and-0.5 (Xin Wei DSP software interview questions)

9. Dsp Structure (Harvard structure); (unknown)

10. The types of embedded processors (such as arm), operating system types (such as VxWorks, UCOS, WinCE, and Linux) and operating systems are biased towards Cs. I will talk about them in the CS article; (unknown)

11. How do you design your test project if you have an ldos chip that will be used to power your cell phone?

12. A program has been optimized in an embedded system (200 m CPU, 50 m sdram) and switched to a zero system (300 m CPU, 50 m sdram) is optimization required? (Intel)

13. Briefly describe the basic principles and implementation methods of Huffman encoding. (Shi LAN micro interview questions)

14. Specify the layer-4 (any layer-4) in the OSI Layer-7 network protocol ). (Shi LAN micro interview questions)

15. A) (Shi LAN micro interview questions)

# I nclude

Void testf (int * P)

{

* P = 1;

}

Main ()

{

Int * n, m [2];

N = m;

M [0] = 1;

M [1] = 8;

Testf (N );

Printf ("Data v alue is % d", * n );

}

------------------------------

B)

# I nclude

Void testf (INT ** P)

{

* P = 1;

}

Main ()

{Int * n, m [2];

N = m;

M [0] = 1;

M [1] = 8;

Testf (& N );

Printf (Data v alue is % d ", * n );

}

Is the result of program a or program B?

Data v alue is 8

So what is the result of another program?

16. Which sort method is the fastest? (Huawei interview questions)

17. Write two sorting algorithms. Which one is better? (Wei Sheng)

18. Compile a simple n! Program. (Infineon test questions)

19. Write N in a programming language! . (Weisheng via 2003.11.06 Shanghai Written Examination)

20. Write a recursive algorithm in C to calculate n !; (Huawei interview questions)

21. Give a C function to identify errors related to strings and arrays. (Huawei interview questions)

22. How is the firewall implemented? (Huawei interview questions)

23. What programming skills are you familiar? (Huawei interview questions)

24. Principle of Bubble sorting. (Xintai hardware questions)

25. operating system functions. (Xintai hardware questions)

26. Learned computer languages and developed systems. (Xintai hardware questions)

27. A farmer found that the square fence saved four wooden piles but the area was the same as that of the rectangle. The number of sheep was the same as that of the square fence but less than 36. How many sheep are there? (Wei Sheng)

28. The C language is used to count the number of times a cell is called in A. v file (This question is BT) (Weisheng via2003.11.06 Shanghai Written Examination)

29. Use the C language to write a driver that controls the motor vibrator in the mobile phone. (Wei Sheng)

30. Use Perl or Tcl/tk to implement a program for string recognition and comparison. (Unknown)

31. A stack structure is provided, and the result is displayed after interruption. It is mainly used to test whether the stack push return address is stored in the low-end address or high-end address. (Unknown)

32. Some DOS commands, such as displaying, copying, and deleting files. (Unknown)

33. Design a class so that any form of derived classes of this class, no matter how defined or implemented, cannot generate any object instance. (IBM)

34. What is pre-emption? (Intel)

35. What is the state of a process if a resource is not available? (Intel)

36. Three float a, B, c; question value (a B) C = (B a) C, (a B) C = (a c) B. (Intel)

37. Fill in the blanks in the reverse direction of a linked list. (Lucent)

38. How many times does x ^ 4 A * x ^ 3 x ^ 2 C * x D require multiplication? (Dephi)

____________________________________________________________

6. subjective questions

1. What do you think are the characteristics of your R & D work? (Shi LAN micro interview questions)

2. Describe your greatest weakness and improvement methods. (Weisheng via 2003.11.06 Shanghai Written Examination)

3. Express your ideal. Name the target you want to achieve. The answer is in English. (Weisheng via 2003.11.06 Shanghai Written Examination)

4. We divide our R & D personnel into several research directions to understand protocols and algorithms (mainly used in network communication and image speech compression) research on the electronic system scheme, use MCU and DSP Programming to Implement circuit functions, and use ASIC design technology to design circuits (including MCU and DSP itself) circuit function module design (including analog circuit and digital circuit), integrated circuit backend design (mainly refers to integrated and Automatic Layout wiring technology), integrated circuit design and process interface research.

What research do you want to do? (You can select multiple directions. In addition, people who have already engaged in R & D can describe your R & D experience in detail ). (Shi LAN micro interview questions)

5. Let's talk about the overall idea of a system design. What kind of knowledge do you think should you have? (Shi LAN micro interview questions)

6. Imagine that you will design an electronic circuit. Please briefly describe the whole process of designing with EDA software (such as Protel) (including schematic diagram and PCB diagram) to debug the prototype. What issues should we pay attention to in each link? Power supply stability, power capacity selection, and layout size. (Hand Wang Written Examination)

7. Common notes

1. Generally, the interviewer asks questions based on your resume. Therefore, you must be responsible for yourself and understand your resume;

2. Individual recruitment is very targeted, so we will recruit people who are in the correct direction. In this case, we have to leave it to our best to introduce what they are concerned about.

3. In fact, the technical interview is not difficult, but it is difficult because many things are forgotten. So you 'd better read the book before the interview.

4. although the technical interview is a battle and embodiment of strength, it is undeniable that there is a great deal of contingency in interviews because the interviewer/company's specialized fields and hobbies are not required. You cannot deny or scold the company because you are rejected.

5. Take it easy during the interview. The more you love, the more you like.