20. What will be the output of the following C code?

(A) 36
(B) 39
(C) 93
(D) 63
(E) 96

16. What will be the output of the following C code ?   (A) 2 (B) 3 (C) 4 (D) 5 (E) None of the above 

17. Consider the following instruction mix for a processor: ALU operations: 40%, uses 4 cycles. Branch operations: 30%, uses 4 cycles. Memory references: 30%, uses 5 cycles. The un-pipelined processor has a clock cycle time of 1 ns. The pipelined processor has a clock cycle time of 1.2 ns. Suppose that we ignore any latency and hazards, and assume that the pipelined processor has an ideal CPI (cycles per instruction) of 1. How much speedup can be achieved when comparing the un-pipelined processor and the pipelined processor? (A) 3.28 (B) 3.35 (C) 3.58 (D) 3.86 (E) 3.98

18. Perform a DFS (Depth-First Search) traversal of this graph by starting at node 1 and going in the order of numbers in Arabic when picking which neighbor to visit first. Which of the following is the CORRECT traversal order?   (A) 1, 2, 6, 4, 5, 3, 7 (B) 1, 2, 4, 6, 5, 3, 7 (C) 1, 2, 4, 5, 6, 3, 7 (D) 1, 2, 4, 3, 7, 5, 6 (E) 1, 2, 4, 5, 3, 7, 6

19. Consider the following C code:When the code is executed, what is the final value of x? (A) 20 (B) 24 (C) 28 (D) 32 (E) 36

21. In machine learning, one of the most common problems that will occur when we are training a model is overfitting. There are some techniques that could ease or even solve this problem. Which of the following technique does NOT alleviate overfitting problem? (A) Adding dropout between layers. (B) Increasing training epochs. (C) Data augmentation. (D) Early stopping while training model. (E) Using L1/L2 regularization.

22. Consider the following C program code and statements (1)~(5). (1) node[1].num = 0 (2) node[1].num = 1 (3) node[2].ptr-＞num = 9 (4) node[9].ptr-＞ptr-＞num = 121 (5) node[9].ptr-＞num = 100 Which of the following statements is CORRECT? (A) (1)(3)(4)(5) (B) (1)(3) (C) (2)(3) (D) (2)(3)(4)(5) (E) (4)(5)

23. The following is a C program code: Which one of the following statements is CORRECT? (A) When a=8, b=5, c=6, then A is 81, B is 5. (B) When a=8, b=5, c=6, then A is 81, B is 6. (C) When a=8, b=5, c=6, then A is 17, B is 5. (D) When a=8, b=5, c=6, then A is 17, B is 6. (E) When a=8, b=5, c=6, then A is 16, B is 6.

24. Suppose there are 16 users in the system, and they use symmetric encryption to achieve confidential communication, how many keys need to be managed? (A) 125 (B) 256 (C) 120 (D) 128 (E) 160

25. Let a, b, c be three 8-bit operands to a carry-save adder and their values be a = 00010110, b = 01101101 and c = 01001110. What are carry outputs of this carry-save adder? (A) 01001110 (B) 00110101 (C) 01010110 (D) 00111010 (E) 01101101

26. Which of the following activation functions can avoid the vanishing gradient problem? (A) ReLU (B) tanh (C) Sigmoid (D) ELU (E) None of the above