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A user extracts an e-coin from a financial institution via blinding techniques. Subsequently, the bank observes the deposited coin but is unable to associate it with the user’s withdrawal. What characteristic is attained? [1]

Upon withdrawal, the bank mandates that the customer verify their identity (KYC/login) prior to endorsing any coin request. What prevents this from automatically compromising payer anonymity in Chaumian e-cash?[1]

A purchaser contests a card transaction, prompting the bank to reverse it following an inquiry. What characteristic of bank payments facilitates this? [1]

Graph the solution of the system of inequalities. Find the coordinates of all vertices, and determine whether the solution set is bounded. ​

II. VOCABULARY [1 activity; 9 points total]A. Un viaje a Colombia.  Yolanda is planning for her trip to Colombia next summer. She is writing a list of all the activities and things she must do. First, read her descriptions below. Then, for each item, select the corresponding word from the dropdown menu. If none of the options provided are logical, select ninguna de las anteriores (none of the above). (1 pt. each; 9 pts. total) MODELO:  Necesito ir a _________ porque en Colombia usan pesos colombianos. La casa de cambio.              a. la oficina de turismo    d. la guía             b. el centro histórico        e. la tarjeta postal              c. la casa de cambio         f. ninguna de las anteriores   Para hacer un viaje internacional necesito un [blank1]. En el avión, voy a viajar en [blank2] porque tengo mucho dinero. Cuando viajo por avión me gusta mirar por la ventana porque tiene [blank3] maravillosa desde arriba. Si no puedo pagar con tarjeta de crédito, necesito ir al [blank4]. ​ Espero que en Bogotá haya un [blank5] como Cedar Point y Magic Kingdom. ​ Voy a usar un [blank6] para recorrer la ciudad de Caracas, Venezuela. En mi viaje voy a comprar una [blank7] para mi familia. ​ En Bogotá tengo que recoger mi maleta en [blank8]. Después de facturar mi equipaje, tengo que pasar por [blank9].

Character literals are enclosed in single quotes, and string literals are enclosed in double quotes.

What will be displayed after the following statements are executed?   int ans = 10; int x = 65; int y = 55; if (x >= y) {      int ans = x + y; } System.out.println(ans);

s.toUpperCase() changes all characters of s to uppercase permanently 

Which one is the correct expression for x being a value between 500 and 650 (not inclusive), or y not equal to 1000?