कंप्यूटर अवेयरनेस टेस्ट - 17

Ans.(b)
Sol. Except Virtual Reality all other are obvious security threats to computers and data.

Ans.(b)
Sol. Except option (b) all others are the symptoms of a computer virus.

Ans.(a)
Sol. VIRUS stands for Vital Information Resources Under Siege

Ans.(c)
Sol. A macro virus is a virus that is written in a macro language: a programming language which is embedded inside a software application (e.g., word processors and spreadsheet applications)

 Ans.(a)
Sol. Creeper virus is a computer virus that is most commonly recognized as the first computer virus.

Ans.(b)
Sol. Since one table can have at the most one primary key to avoid duplicates in other columns of the table, unique key can be defined. We can make one or more unique keys in a single table.

Ans.(d)
Sol. The text written within the H4 element has the same size as the normal plain text, whereas the text written within the H1, H2 and H3 elements are larger than the normal text. Text written within the H5 and H6 elements has smaller size than the normal text.

Ans.(d)
Sol. In HTML, logical style tags specify that the enclosed text has a specific meaning, context, or usage. The is a logical style tag, which conveys to the Web browser that the text enclosed within this tag is an abbreviation.

Ans.(b)
Sol. Distributed Denial-of-Service (DDoS) attack is a type of attack that is carried out by using multiple computers. These DDoS attacks aim at targeting computer networks of an organisation, such as Digital Subscriber Line (DSL) and cable.

Ans.(d)
Sol. In a message-switched network, a packet containing the entire message is transmitted over the network. It is a more expensive network.

Ans.(b)
Sol. A data bus connects internal components to the motherboard and acts as a carrier for the data.

Ans.(b)
Sol. Television is an example of simplex communication.

Ans.(b)
Sol. MS DOS stands for Microsoft Disk Operating System it is a discontinued operating system for x86-based personal computers mostly developed by Microsoft.

Ans.(d)
Sol. Both SELECT and UPDATE are DML commands of SQL. DML is abbreviation of Data Manipulation Language. It is used to retrieve, store, modify, delete, insert and update data in database.

 Ans.(e)
Sol. All the given options are examples of pointing devices.

Ans.(a)
Sol. A hyperlink, or simply a link, is a reference to data that the reader can directly follow either by clicking, tapping, or hovering. Hyperlinks are found in nearly all Web pages, allowing users to click their way from page to page.

Ans (a)
Sol.  TeamViewer is a proprietary computer software package for remote connection, desktop sharing, online meetings, web conferencing and file transfer between computers.

Ans (b)
Sol.  Most tags in HTML must have two parts, an opening and a closing part. For example, is the opening tag and is the closing tag.

Ans (b)
Sol.  Through edit we can make changes.

Ans (a)
Sol.  E-R model uses top-down approach; Bottom-up approach is known as normalization.

Ans. (e)
Sol.  Laser is the term related with scanner as there are laser scanners. TWAIN is an applications programming interface (API) and communications protocol that regulates communication between software and digital imaging devices, such as image scanners. It is a widely-used program that lets you scan an image (using a scanner) directly into the application.

Ans. (a)
Sol. Nibble= 4 Bits

Ans.(a)
Sol. Relational database is a collection of Relations or Table. A table is also known as relation in RDBMS. Fields are the column of the relation or tables. Records are each row in relation. Keys are the constraints in a relation.

Ans.(b)
Sol. Attribute may refer to columns in a table and tuple refers to rows in a table.

Ans.(a)
Sol. The values of the attribute should be present in the domain. Domain is a set of values permitted.

Ans.(d)
Sol. Instance is an instance of time and schema is a representation.

Ans.(d)
Sol. An external schema specifies a view of the data in terms of the conceptual level. This is also referred to as the view level.

Ans.(a)
Sol. A data manipulation language (DML) is a family of syntax elements similar to a computer programming language used for selecting, requesting, inserting, deleting and updating data in a database.

 Ans. (d)
Sol. A field is category of information.

Ans. (c)
Sol. Super key is a set of one or more attributes taken collectively to uniquely identify a record.