Practice Questions & Answers :: Cocubes

Cocubes
Tot. Mock Test: 73+
Tot. Exam. Sec.: 5+
Total Practice Qs: 137+
21 / 137
From the diagram given below showing characteristics of voltage across resistor and inductor with respect to time, what conclusion can be drawn due to exponential growth of current through inductor?
AVoltage across resistor and inductor increases
BVoltage across resistor and inductor decreases
CVoltage across resistor increases but decreases across inductor
DVoltage across resistor decreases but increases across inductor
Answer: Option C
Explanation:Observing the graph we can see that Vr(t) is increasing and Vl(t) is decreasing gradually.
Submit Your Solution
Tags: No Tags on this question yet!
22 / 137
What is the name of the pressure that moves electrons in a closed circuit?
AVoltage
Bohms
Camperes
Dcoulumbs
Answer: Option A
Explanation:Voltage which is also called as electromotive force(pressure), is a measure of the potential difference in charge between two points in an electrical field which is responsible for the movement of electrons in a closed circuit.
Submit Your Solution
Tags: No Tags on this question yet!
23 / 137
What is the value of ZL
AR
BR +
CR -
DNone of these
Answer: Option C
Explanation:The value of load for maximum power transfer is given by complex conjugate of ZAB. ZAB
Submit Your Solution
Tags: No Tags on this question yet!
24 / 137
The clock speed of 8085 is
A1MHz
B1KHz
C3.2KHz.
D3.2MHz.
Answer: Option D
Explanation:8085 requires a signal +5V power supply and operates at 3.2 MHZ single phase clock.
Submit Your Solution
Tags: No Tags on this question yet!
25 / 137
The processor status word of 8085 microprocessor has five flags namely:
AS, Z, AC, P, CY
BS, OV, AC, P, CY
CS, Z, OV, P, CY
DS, Z, AC, P, OV
Answer: Option A
Explanation:8085 microprocessor has 5 status flag S ? Sign flag Z ? Zero flag AC ? Auxiliary carry flag P ? Parity flag CY ? Carry flag
Submit Your Solution
Tags: No Tags on this question yet!
26 / 137
In a JK flip-flop, J is connected to
ARS Flip Flop
BD Flip Flop
CT Flip Flop
DClocked RS FF
Answer: Option B
Explanation:According to the question below is the figure.Seeing the truth table both the input is opposite to each other hence it is D Flip Flop.
Submit Your Solution
Tags: No Tags on this question yet!
27 / 137
The software that transfers the object program from secondary memory to the main memory is called
Aassembler
Bloader
Clinker
Dtask builder
Answer: Option B
Explanation:In Computing, a loader is the part of an Operating System that is responsible for loading programs. It is one of the essential stages in the process of starting a program. Because it places programs into memory and prepares them for execution.
Submit Your Solution
Tags: No Tags on this question yet!
28 / 137
Which of the following modulation schemes is digital in nature?
APulse Amplitude Modulation
BPulse Position Modulation
CPulse Width Modulation
DDelta Modulation
Answer: Option D
Explanation:A delta modulation is an analog-to-digital and digital-to-analog signal conversion technique used for transmission of voice information where quality is not of primary importance.
Submit Your Solution
Tags: No Tags on this question yet!
29 / 137
If the input to T-flip-flop is 120 Hz signal, then the final output of the three T-flip-flops in cascade will be:
A15 Hz
B18.5Hz
C12.5Hz
D5oHz
Answer: Option A
Explanation:T=f/(2 ^N) where N is the number of flipflops in cascade so 120/8= 15Hz
Submit Your Solution
Tags: No Tags on this question yet!
30 / 137
The timing network that sets the output frequency of a 555 astable circuit contains ________.
Athree external resistors are used
Btwo external resistors and an external capacitor are used
Can external resistor and two external capacitors are used
Dno external resistor or capacitor is required
Answer: Option B
Explanation:To find Astable multivibrator output frequency. The formula is Output frequency = 1.44 / [ (R1+2R2)*C ].So we need 2 external resistors and external capacitor.
Submit Your Solution
Tags: No Tags on this question yet!
Here is the list of questions asked in Cocubes paper Practice questions with Answers Page 3. Practice Cocubes Written Test Papers with Solutions and take Q4Interview Cocubes Online Test Questions to crack Cocubes written round test. Overall the level of the Cocubes Online Assessment Test is moderate. Only those candidates who clear the written exam will qualify for the next round, so practic all the questions here and take all the free tests before going for final selection process of Cocubes