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 ...
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
Documentation.pdf")
0b111000
0b101010
0b100001
0b10000000 - 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
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
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