CEA201 EXAM QUESTIONS WITH 100% CORRECT ANSWERS

CEA201 EXAM QUESTIONS WITH 100% CORRECT ANSWERS 1. What is ISA stands for (in this course)? Instruction Set Architecture Interrupt Service Architecture Information Services Analysis Integrated Support Activity - Answer-A 2. How many bits does the PC (Program Counter register) of the Beta have? 4 8 16 32 - Answer-D 3. How many registers does the Beta have (exclude PC)? 16 31 32 128 - Answer-C 4. What is the special of R31 register? It is a stack pointer It is the fastest register It is more power efficient its value always reads as 0 and writes to R31 have no affect on its value. - Answer-D 5. How many memory locations can be accessed by Beta? 32 Bytes 4 Mbytes 32 Mbytes 4 GBytes - Answer-D 6. How many bytes does each word contains of the Beta? 1 4 8 32 - Answer-B 7. The "0x" prefix indicates when a number is in __________ notation. Binary Octal Decimal Hexadecimal - Answer-D 8. In general, all program data will reside in __________. Cpu control unit main memory register - Answer-C 1. Which of the following instruction types does the Beta ISA have? (choose all that apply) Branch High level language Arithmetic and logical Load and store Interrupt - Answer-A C D 2. What is the size of all instruction encoding in Beta ISA? 32 bits 64 bits Variable-length encoding for instructions None of the others - Answer-A 3. How many fields does a Beta ALU instruction have? 2 (1 source operand, 1 destination operand) 3 (1 opcode, 1 source operands, 1 destination register) 4 (1 opcode, 2 source operands, 1 destination register) 5 (1 opcode, 3 source operands, 1 destination register) - Answer-C 4. What is the opcode for SUB instruction? (find your anwer in the "Beta D") 0b111000 0b101010 0b100001 0b - Answer-C 5. ADD(Ra,Rb,Rc) instruction asks the Beta do: Ra = Rb + Rc Rc = Ra + Rb Ra = Rb if (Rc = 0) Rc = Rb if (Ra = 0) - Answer-B 1. In the Beta instruction format with constant, the constant in _________ format. unsigned binary one's complement two's complement sign-magnitude - Answer-C 2. In the Beta instruction format with constant, the constant operands in the range of _________ (in decimal). 0 to 64000 -32000 to 32000 -32768 to 32767 0b8000 to 0b7FFF - Answer-C 3. What does the ADDC(R1,-3,R3) instruction do? R3 = R1 + 3 R3 = R1 - 3 R1 = R3 + 3 R1 = R3 - 3 - Answer-B 4. A "C" suffix in some instruction (e.g ADDC, ANDC, SUBC) indicate _________. the register stores content of data the second operand is a constant the second operand is a register this is a Compare instruction - Answer-B 1. In this lesson, Mem[0x1008] means __________. address of the current instruction address of the next instruction the stack pointer is 0x1008 contents of memory location 0x1008 - Answer-D 2. In this lesson, what does effective address - EA mean? EA is actual address of location containing the referenced operand EA is content of program counter EA is the fist memory address EA is the end of memory address - Answer-A 3. In some instruction of Beta, the word "literal" means _______. a register a memory location a sign-extended 16-bit number a unsign-extended 16-bit number - Answer-C 4. What does the LD(R0,5,R1) instruction do? R0 = Mem[R1 + 5] R1 = Mem[R0 + 5] R1 = R0 + 5 R0 = R1 + 5 R1 = R0 + Men[5] - Answer-B 5. What does the ST(R0,3,R1) instruction do? R0 = Mem[R1 + 3] Mem[R1 + 3] = R0 Mem[R0 + 3] = R1 R1 = R0 + 3 R0 = R1 + 3 - Answer-B 1. What does the BEQ(R0,5,R1) instruction do? R0 = 5 XOR R1 R1 = 5 XOR R0 The next instruction after the current instruction is 5 instructions if R0=0 The next instruction after the current instruction is 5 instructions if R0 ≠ 0 - Answer-C 2. What is the value will be written to R1 after BEQ(R0,5,R1) instruction? R1 = PC + 3 R1 = PC + 4 R1 = PC + 5 R1 = PC - 5 - Answer-B 3. What does the BNE(R0,5,R1) instruction do? (cẩn thận lộn) The next instruction before the current instruction is 5 instructions if R1=0 The next instruction after the current instruction is 5 instructions if R1=0 The next instruction after the current instruction is 5 instructions if R0=0 The next instruction after the current instruction is 5 instructions if R0 ≠ 0 - Answer-D 4.What is the value will be written to R1 after BNE(R0,5,R1) instruction? R1 = PC + 3 R1 = PC + 4 R1 = PC + 5 R1 = PC - 5 - Answer-B 5. Assume that R0 = 8, what is the address of next instruction after JMP(R0,R1) instruction? 8 R1 R1 - 8 R1 + 8 - Answer-A 1. Select a right statement: BSIM is used to circuit design. BSIM permits us simulate the Beta CPU. BSIM can not assembler source code. - Answer-B