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MCQOPTIONS
This section includes 839 Mcqs, each offering curated multiple-choice questions to sharpen your C++ Programming knowledge and support exam preparation. Choose a topic below to get started.
| 301. |
The Advanced Encryption Standard (AES), has three different configurations with respect to the number of rounds and |
| A. | Data Size |
| B. | Round Size |
| C. | Key Size |
| D. | Encryption Size |
| Answer» D. Encryption Size | |
| 302. |
Which one of the following uses a 128bit round key to encrypt the data using XOR and use it in reverse to decrypt it ? |
| A. | Round key algorithm |
| B. | Public key algorithm |
| C. | Advanced Encryption Standard |
| D. | Asymmetric key algorithm |
| Answer» D. Asymmetric key algorithm | |
| 303. |
Which is the principle of the encryption using a key? |
| A. | The key indicates which funcion is used for encryption. Thereby it is more difficult to decrypt a intercepted message as the function is unknown |
| B. | The key contains the secret function for encryption including parameters. Only a password can activate the key |
| C. | All functions are public, only the key is secret. It contains the parameters used for the encryption resp. decryption |
| D. | The key prevents the user of having to reinstall the software at each change in technology or in the functions for encryption |
| Answer» C. All functions are public, only the key is secret. It contains the parameters used for the encryption resp. decryption | |
| 304. |
Which of the following requires no password travel across the internet ? |
| A. | Readable system |
| B. | Manipulation system |
| C. | Challenge–response system |
| D. | Responce system |
| Answer» D. Responce system | |
| 305. |
Which is the largest disadvantage of the symmetric Encryption? |
| A. | More complex and therefore more time-consuming calculations |
| B. | Problem of the secure transmission of the Secret Key |
| C. | Less secure encryption function |
| D. | Isn’t used any more |
| Answer» C. Less secure encryption function | |
| 306. |
Which of the following is not a property of good encryption technique ? |
| A. | Relatively simple for authorized users to encrypt and decrypt data |
| B. | Decryption key is extremely difficult for an intruder to determine |
| C. | Encryption depends on a parameter of the algorithm called the encryption key |
| D. | None of the mentioned |
| Answer» E. | |
| 307. |
Assymmetric Encryption: Why can a message encrypted with the Public Key only be decrypted with the receiver’s appropriate Private Key? |
| A. | Not true, the message can also be decrypted with the Public Key |
| B. | A so called “one way function with back door” is applyed for the encryption |
| C. | The Public Key contains a special function which is used to encrypt the message and which can only be reversed by the appropriate Private Key |
| D. | The encrypted message contains the function for decryption which identifies the Private Key |
| Answer» C. The Public Key contains a special function which is used to encrypt the message and which can only be reversed by the appropriate Private Key | |
| 308. |
In which of the following encryption key is used to encrypt and decrypt the data ? |
| A. | Public key |
| B. | Private key |
| C. | Symmetric key |
| D. | Asymmetric key |
| Answer» D. Asymmetric key | |
| 309. |
The cipher which uses the exclusive-or operation as defined in computer science is called |
| A. | Caesar cipher |
| B. | XOR cipher |
| C. | cipher |
| D. | cipher text |
| Answer» C. cipher | |
| 310. |
The shift cipheris sometimes referred to as the |
| A. | Caesar cipher |
| B. | Julia cipher |
| C. | plain cipher |
| D. | All of them |
| Answer» B. Julia cipher | |
| 311. |
The Data Encryption Standard (DES) was designed by |
| A. | Microsoft |
| B. | Apple |
| C. | IBM |
| D. | None |
| Answer» D. None | |
| 312. |
RSA stands for |
| A. | Rivest, Shamir, Adleman |
| B. | Roger, Shamir, Adrian |
| C. | Robert, Shamir, Anthoney |
| D. | Rivest, Shaw, Adleman |
| Answer» B. Roger, Shamir, Adrian | |
| 313. |
ECB stands for |
| A. | Electronic Control Book |
| B. | Electronic Code Book |
| C. | Electronic Cipher Book |
| D. | Electronic Cryptography Book |
| Answer» C. Electronic Cipher Book | |
| 314. |
The Cryptography can provide |
| A. | entity authentication |
| B. | nonrepudiation of messages |
| C. | confidentiality |
| D. | All of them |
| Answer» E. | |
| 315. |
The process of transforming plain text to unreadable text. |
| A. | Decryption |
| B. | Encryption |
| C. | Network Security |
| D. | Information Hiding |
| Answer» C. Network Security | |
| 316. |
The microcomputer system by using the ____device interface |
| A. | Input |
| B. | Output |
| C. | Both a and b |
| D. | None of these |
| Answer» D. None of these | |
| 317. |
Pseudo instructions are basically |
| A. | false instructions |
| B. | instructions that are ignored by the microprocessor |
| C. | assembler directives |
| D. | instructions that are treated like comments |
| Answer» D. instructions that are treated like comments | |
| 318. |
The ____ place the data from a register onto the data bus. |
| A. | CPU |
| B. | ALU |
| C. | Both a and b |
| D. | None of these |
| Answer» B. ALU | |
| 319. |
In which form CPU provide output: |
| A. | Computer signals |
| B. | Digital signals |
| C. | Metal signals |
| D. | None of these |
| Answer» C. Metal signals | |
| 320. |
The first task of DOS operating system after loading into the memory is to use the filecalled___________ |
| A. | HIMEM.SYS |
| B. | CONFIG.SYS |
| C. | AUTOEXEC.BAT |
| D. | SYSTEM.INI |
| Answer» C. AUTOEXEC.BAT | |
| 321. |
The first modern computer was called_____________ |
| A. | FLOW-MATIC |
| B. | UNIVAC-I |
| C. | ENIAC |
| D. | INTEL |
| Answer» D. INTEL | |
| 322. |
Which are the four categories of registers: |
| A. | General‐ purpose register |
| B. | Pointer or index registers |
| C. | Segment registers |
| D. | All of these |
| Answer» E. | |
| 323. |
MSD stands for: |
| A. | Least significant digit |
| B. | Most significant digit |
| C. | Medium significant digit |
| D. | low significant digit |
| Answer» C. Medium significant digit | |
| 324. |
The 16 bit register is separated into groups of 4 bit where each groups is called: |
| A. | BCD |
| B. | Nibble |
| C. | Half byte |
| D. | None of these |
| Answer» C. Half byte | |
| 325. |
Signal voltage ranges for a logic high and for a logic low in RS-232C standard are |
| A. | Low = 0 volt to 1.8 volt, high = 2.0 volt to 5 volt |
| B. | Low =-15 volt to –3 vol, high = +3 volt to +15 volt |
| C. | Low = +3 volt to +15 volt, high = -3 volt to -15 volt |
| D. | Low = 2 volt to 5.0 volt, high = 0 volt to 1.8 volt |
| Answer» C. Low = +3 volt to +15 volt, high = -3 volt to -15 volt | |
| 326. |
A nibble can be represented in the from of: |
| A. | Octal digit |
| B. | Decimal |
| C. | Hexadecimal |
| D. | None of these |
| Answer» D. None of these | |
| 327. |
A/n …. Device is any device that provides information, which is sent to the CPU. |
| A. | Input |
| B. | Output |
| C. | CPU |
| D. | Memory |
| Answer» B. Output | |
| 328. |
The left side of any binary number is called: |
| A. | Least significant digit |
| B. | Most significant digit |
| C. | Medium significant digit |
| D. | low significant digit |
| Answer» C. Medium significant digit | |
| 329. |
Which one of the following is not a vectored interrupt? |
| A. | TRAP |
| B. | INTR |
| C. | RST 7.5 |
| D. | RST 3 |
| Answer» E. | |
| 330. |
Which is the brain of computer ? |
| A. | ALU |
| B. | CPU |
| C. | MU |
| D. | None of these |
| Answer» C. MU | |
| 331. |
PROM stands for |
| A. | Programmable read‐only memory |
| B. | Programmable read write memory |
| C. | Programmer read and write memory |
| D. | None of these |
| Answer» B. Programmable read write memory | |
| 332. |
Synchronization bit at the beginning of character is called ________. |
| A. | stop bit |
| B. | simplex |
| C. | half duplex |
| D. | start bit |
| Answer» E. | |
| 333. |
Which is a 8 bit Microprocessor ? |
| A. | Intel 4040 |
| B. | Pentium-I |
| C. | 8088 |
| D. | Motorala MC-6801 |
| Answer» E. | |
| 334. |
EPROM stands for |
| A. | Erasable Programmable read‐only memory |
| B. | Electrically Programmable read write memory |
| C. | Electrically Programmable read‐only memory |
| D. | None of these |
| Answer» B. Electrically Programmable read write memory | |
| 335. |
The First electronic computer was completed in __________. |
| A. | 1946 |
| B. | 1938 |
| C. | 1941 |
| D. | 1950 |
| Answer» B. 1938 | |
| 336. |
What is the microprocessor comprises: |
| A. | Register section |
| B. | One or more ALU |
| C. | Control unit |
| D. | All of these |
| Answer» E. | |
| 337. |
Each memory location has |
| A. | Address |
| B. | Contents |
| C. | Both a and b |
| D. | None of these |
| Answer» D. None of these | |
| 338. |
Customized ROMS are called |
| A. | Mask ROM |
| B. | Flash ROM |
| C. | EPROM |
| D. | None of these |
| Answer» B. Flash ROM | |
| 339. |
The First Microprocessor was__________. |
| A. | Intel 4004 |
| B. | Intel 8080 |
| C. | Intel 8085 |
| D. | Intel 4008 |
| Answer» B. Intel 8080 | |
| 340. |
Designing logic circuits and writing instructions to enable the microprocessor to communicate with peripheral is called _________. |
| A. | interfacing |
| B. | monitoring |
| C. | polling |
| D. | pulling |
| Answer» B. monitoring | |
| 341. |
_______ means at the same time, the transmitter and receiver are synchronized with the same clock. |
| A. | asynchronous |
| B. | serial data |
| C. | synchronous |
| D. | parallel data |
| Answer» D. parallel data | |
| 342. |
The 1 MB byte of memory can be divided into ______ segment. |
| A. | 1 Kbyte |
| B. | 64 Kbyte |
| C. | 33 Kbyte |
| D. | 34 Kbyte |
| Answer» C. 33 Kbyte | |
| 343. |
The IF is called as _________. |
| A. | initial flag |
| B. | indicate flag |
| C. | interrupt flag |
| D. | inter flag |
| Answer» D. inter flag | |
| 344. |
A microprocessor is a _______ chip integrating all the functions of a CPU of a computer. |
| A. | multiple |
| B. | single |
| C. | double |
| D. | triple |
| Answer» C. double | |
| 345. |
Microprocessor is a/an _______ circuit that functions as the CPU of the computer. |
| A. | electronic |
| B. | mechanic |
| C. | integrating |
| D. | processing |
| Answer» B. mechanic | |
| 346. |
Microprocessor is the ______ of the computer and it perform all the computational tasks. |
| A. | main |
| B. | heart |
| C. | important |
| D. | simple |
| Answer» C. important | |
| 347. |
The OF is called as _______. |
| A. | overflow flag |
| B. | overdue flag |
| C. | one flag |
| D. | over flag |
| Answer» B. overdue flag | |
| 348. |
The CF is known as ________. |
| A. | carry flag |
| B. | condition flag |
| C. | common flag |
| D. | cross flag |
| Answer» B. condition flag | |
| 349. |
The SF is called as ________. |
| A. | service flag |
| B. | sign flag |
| C. | single flag |
| D. | signal flag |
| Answer» C. single flag | |
| 350. |
Before a disk can be used to store data. It must be……. |
| A. | Formatted |
| B. | Reformatted |
| C. | Addressed |
| D. | None of the above |
| Answer» B. Reformatted | |