Chapter 2 · MCQ Read Mode

Digital Logic and Microprocessor

The hexadecimal number F is equal to which decimal value?

NAND and NOR gates are called universal gates because:

The 2's complement of a binary number is used in digital systems to represent:

An XOR gate produces output 1 only when its inputs are:

How many binary bits does one hexadecimal digit represent?

According to De Morgan's theorem, (A + B)' equals:

A Karnaugh map simplifies Boolean expressions by:

The decimal number 13 in binary is:

An AND gate with inputs A=1 and B=0 produces output:

The 2's complement of the binary number 0110 is:

A 4-to-1 multiplexer requires how many select lines?

The Sum output of a half adder is produced by which gate?

A 3-to-8 decoder has 3 input lines and ____ output lines.

What distinguishes a full adder from a half adder?

The Carry output of a half adder is produced by which gate?

A demultiplexer routes data from:

An 8-to-3 encoder has 8 input lines and how many output lines?

In hardware, binary subtraction is performed by:

Combinational circuits differ from sequential circuits in that they have:

In 2's complement signed numbers, a 1 in the most significant bit (MSB) indicates:

Sequential circuits produce outputs that depend on:

In an SR flip-flop, which input combination must never be applied?

A JK flip-flop with J=1 and K=1 applied will:

A D flip-flop's output Q on a clock edge will be:

A flip-flop differs from a latch in that a flip-flop is:

An n-bit binary counter can count how many distinct states?

In a ripple (asynchronous) counter, each flip-flop is clocked by:

A register stores data using a group of:

Which flip-flop is most commonly used as the basic cell of a synchronous counter?

Synchronous counters are preferred over ripple counters mainly because they are:

The Program Counter (PC) in a microprocessor holds:

The address bus in the 8085 microprocessor is:

Arithmetic and logic operations in a microprocessor are performed by the:

A microprocessor with 16 address lines can directly address how much memory?

Assembly language uses ____ in place of binary machine code.

The Intel 8085 is classified as a(n) ____ microprocessor.

The Stack Pointer (SP) register points to:

The tool that translates assembly language into machine code is called a(n):

After a CALL instruction in 8085, where is the return address saved?

The Zero flag in the 8085 flag register is set when:

DRAM requires periodic refreshing because it stores bits as:

DMA is used primarily to:

Which memory is used for the CPU cache?

Asynchronous serial communication uses ____ to frame each transmitted character.

The Intel 8255 PPI provides:

Which memory type retains data after the power is switched off?

Parallel interface is preferred over serial when:

When a DMA controller takes over the system bus, the CPU:

The correct order from fastest to slowest in the memory hierarchy is:

RS-232 is a standard for which type of communication?

When an interrupt occurs, the CPU first:

Interrupts are more efficient than polling because:

The routine that handles an interrupt is called the:

In the Intel 8085, TRAP has the highest interrupt priority because it is:

Before jumping to an ISR, the CPU saves the return address by pushing it onto the:

A software interrupt in the 8085 is triggered by:

A maskable interrupt can be temporarily disabled by the CPU using:

In a vectored interrupt system, the address of the ISR is:

After the ISR finishes, control returns to the interrupted program using a:

The correct 8085 interrupt priority order from highest to lowest is:

How many NOT gates are required to build a 2:1 Multiplexer?

How many 2-input NAND gates are contained in a standard 7400 TTL IC?

In TTL logic, what is the input voltage range for a logic LOW (active LOW level)?

When an invalid BCD code (1010–1111) is detected and auto-corrected, what value is added?

What is the terminal (reset) state of a MOD-10 (decade) counter?

What is the minimum number of flip-flops (memory blocks) required to build a MOD-6 ripple counter?

An SR flip-flop is also called a:

A JK flip-flop with J = 1 and K = 1 is clocked at 20 kHz. What is the output waveform and its frequency?

What is the duty cycle of an ideal astable multivibrator?

Which of the following is NOT a valid operation of flip-flops?

The TRAP interrupt in 8085 microprocessor is:

Small-Scale Integration (SSI) refers to ICs with how many transistors?

In VHDL, a signal that represents a bus (multi-bit connection) is declared as:

In VHDL, the primary design unit that represents a hardware block's interface (ports and generics) is called:

The shadow mask technique is used in:

Left-shifting an unsigned binary number by 1 bit is equivalent to:

The expression x << 3 is equivalent to:

Which logic gate is commonly used for parity checking and overflow detection?